Flow regulation test system and method

Abstract

The invention belongs to the technical field of test equipment, and discloses a flow regulation test system and method for testing the flow of a carbon tank, the flow regulation test system comprises a regulation mechanism and a test mechanism, the regulation mechanism comprises a vacuum pump and a flow regulation assembly, and the flow regulation assembly is arranged at the inlet end of the vacuum pump; the testing mechanism comprises a first valve body, a second valve body, an absolute pressure sensor and a flow detection assembly, the first valve body is arranged at the end, away from the vacuum pump, of the flow adjusting assembly, the second valve body is arranged at one end of the flow detection assembly, and the carbon tank can be installed between the other end of the flow detection assembly and the first valve body. The absolute pressure sensor is used for detecting the absolute pressure between the first valve body and the second valve body, the flow detection assembly can detect the flow passing through the carbon tank in unit time, and the flow regulation test system can shorten the stable beat of the test system, improve the test efficiency, meet the production requirements and reduce the productivity loss.

Description

Technical Field

[0001] The present invention relates to the technical field of testing equipment, and in particular to a flow regulation testing system and method. Background Art

[0002] In recent years, with the continuous development of the global automotive industry, people are paying more and more attention to environmental protection and energy efficiency. As the main means of transportation for people's daily travel, the performance and environmental friendliness of each component of the car are increasingly valued. Among them, the carbon canister, as one of the important cleaning units inside the car, plays an indispensable role. The main function of the carbon canister is to effectively absorb fuel vapor, reduce the pollution caused by fuel volatilization to the environment, and help improve the energy efficiency of the car.

[0003] As the automobile market continues to expand, the demand for carbon canisters is also increasing. In the production process of carbon canisters, various performance indicators of carbon canisters need to be tested to ensure the product quality of carbon canisters. However, the stable cycle of the existing test system is about 15 seconds, and its test speed is relatively slow, which is difficult to meet the current rapidly growing market demand and production needs.

[0004] Therefore, there is an urgent need to propose a flow regulation test system and method to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a flow regulation test system and method to shorten the stabilization cycle, improve the test efficiency, meet the growing demand for carbon canister production, ensure the smooth completion of production goals, reduce the capacity loss of the remaining production steps due to the time-consuming test link, and thus achieve cost reduction and efficiency improvement.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A flow regulation test system is used to test the flow of a carbon canister, wherein the flow regulation test system includes a regulating mechanism and a testing mechanism, the regulating mechanism includes a vacuum pump and a flow regulation assembly, and the flow regulation assembly is arranged at the inlet end of the vacuum pump; the testing mechanism includes a first valve body, a second valve body, an absolute pressure sensor and a flow detection assembly, the first valve body is arranged at an end of the flow regulation assembly away from the vacuum pump, the second valve body is arranged at one end of the flow detection assembly, the carbon canister can be installed between the other end of the flow detection assembly and the first valve body, the absolute pressure sensor is used to detect the absolute pressure between the first valve body and the second valve body, and the flow detection assembly can detect the flow passing through the carbon canister per unit time.

[0008] Furthermore, the flow regulating assembly includes a flow regulating valve, a first pressure regulating sealing block and a second pressure regulating sealing block, the inlet end of the flow regulating valve is connected to the first pressure regulating sealing block, and the outlet end of the flow regulating valve is connected to the second pressure regulating sealing block.

[0009] Furthermore, the flow regulating assembly includes a plurality of the flow regulating valves.

[0010] Furthermore, the flow detection assembly includes a laminar flow tube and a pressure difference sensor. One end of the laminar flow tube is connected to the second valve body, and the other end can be connected to the carbon canister. The pressure difference sensor is used to detect the pressure difference between the two ends of the laminar flow tube.

[0011] Furthermore, an air inlet end is provided on a side of the second valve body away from the flow detection component, and a temperature sensor is provided on the air inlet end.

[0012] Furthermore, the testing mechanism also includes a third valve body, and the third valve body is arranged at one end of the flow detection assembly close to the carbon canister.

[0013] Furthermore, the first valve body, the second valve body and the third valve body are all shut-off valves.

[0014] Furthermore, the regulating mechanism further comprises a first bottom plate, the vacuum pump and the flow regulating assembly are both mounted on the first bottom plate, and a first handle is provided on the first bottom plate; and / or,

[0015] The testing mechanism also includes a second bottom plate, the first valve body, the second valve body, the absolute pressure sensor and the flow detection assembly are all installed on the second bottom plate, and a second handle is provided on the second bottom plate.

[0016] A flow regulation test method, using the flow regulation test system according to any one of claims 1 to 4, comprising the following steps:

[0017] S1: installing the carbon canister between the first valve body and the flow detection assembly;

[0018] S2: Start the vacuum pump to create a negative pressure environment;

[0019] S3: closing the first valve body and the second valve body, detecting the absolute pressure P between the first valve body and the second valve body by the absolute pressure sensor, and if P reaches the test standard, continuing to the next step of testing; if P does not reach the test standard, determining that the carbon canister is a defective product;

[0020] S4: When P reaches the test standard, the first valve body and the second valve body are opened, and the flow adjustment component is adjusted according to the feedback data of the flow detection component, wherein the flow detection component can detect the flow Q passing through the carbon canister per unit time; if Q can reach the test standard within the time t, the test is terminated and the carbon canister passes the flow test; if Q still cannot reach the test standard within the time t, the carbon canister is judged to be a defective product.

[0021] Furthermore, the testing mechanism also includes a third valve body, and the third valve body is arranged at one end of the flow detection assembly close to the carbon canister. Before the S step, the second valve body and the third valve body are closed, and the absolute pressure P0 between the second valve body and the third valve body is detected by the absolute pressure sensor. If P0 does not meet the test standard, the testing mechanism is repaired and the absolute pressure P0 between the second valve body and the third valve body is detected again until P0 meets the test standard.

[0022] Beneficial effects of the present invention:

[0023] The present invention provides a flow regulation test system and method for testing the flow of a carbon canister, wherein the flow regulation test system includes a regulating mechanism and a testing mechanism, the regulating mechanism includes a vacuum pump and a flow regulation component, and the flow regulation component is arranged at the inlet end of the vacuum pump; the testing mechanism includes a first valve body, a second valve body, an absolute pressure sensor and a flow detection component, the first valve body is arranged at one end of the flow regulation component away from the vacuum pump, the second valve body is arranged at one end of the flow detection component, the carbon canister can be installed between the other end of the flow detection component and the first valve body, the absolute pressure sensor is used to detect the absolute pressure between the first valve body and the second valve body, and the flow detection component can detect the flow passing through the carbon canister per unit time. In actual production, the flow regulation test system provided by this embodiment is used to test the flow of the carbon canister, which can shorten the stable beat of the test system to less than 5s, improve the test efficiency, meet the growing production demand for carbon canisters, ensure the smooth completion of production goals, reduce the production capacity loss of the remaining production steps caused by the excessively long test link, and thus achieve the positive effect of reducing costs and increasing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the flow regulation test system of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the regulating mechanism of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the testing mechanism of the present invention;

[0027] Figure 4 1 is a top view of the testing mechanism of the present invention.

[0028] In the figure:

[0029] 100. Carbon canister;

[0030] 1. regulating mechanism; 11. flow regulating assembly; 111. flow regulating valve; 112. first pressure regulating sealing block; 113. second pressure regulating sealing block; 12. first bottom plate; 13. first handle;

[0031] 2. Testing mechanism; 21. First valve body; 22. Second valve body; 23. Absolute pressure sensor; 24. Flow detection assembly; 241. Laminar flow tube; 242. Pressure difference sensor; 243. Mounting block; 25. Third valve body; 26. Second base plate; 27. Second handle; 28. Temperature sensor. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] like Figure 1 to Figure 4 As shown, the present embodiment provides a flow regulation test system for testing the flow of a carbon canister 100, wherein the flow regulation test system comprises a regulating mechanism 1 and a testing mechanism 2, the regulating mechanism 1 comprises a vacuum pump and a flow regulation assembly 11, and the flow regulation assembly 11 is arranged at the inlet end of the vacuum pump; the testing mechanism 2 comprises a first valve body 21, a second valve body 22, an absolute pressure sensor 23 and a flow detection assembly 24, the first valve body 21 is arranged at one end of the flow regulation assembly 11 away from the vacuum pump, the second valve body 22 is arranged at one end of the flow detection assembly 24, the carbon canister 100 can be installed between the other end of the flow detection assembly 24 and the first valve body 21, the absolute pressure sensor 23 is used to detect the absolute pressure between the first valve body 21 and the second valve body 22, and the flow detection assembly 24 can detect the flow passing through the carbon canister 100 per unit time.

[0037] During the test, the carbon canister 100 to be tested is first installed between the first valve body 21 and the flow detection assembly 24, and a negative pressure environment is established for the flow regulation test system through a vacuum pump; then, the first valve body 21 and the second valve body 22 are closed, and the absolute pressure P between the first valve body 21 and the second valve body 22 is detected by the absolute pressure sensor 23. If P meets the test standard, the pressure holding performance of the carbon canister 100 is qualified and the next step of the test can be continued. If P does not meet the test standard, the carbon canister 100 is judged to be unqualified; finally, when When P reaches the test standard, the first valve body 21 and the second valve body 22 are opened, and the flow rate through the carbon canister 100 per unit time is detected by the flow detection component 24. According to the feedback data of the flow detection component 24, the flow adjustment component 11 adjusts the flow rate until the flow rate through the carbon canister 100 per unit time reaches the test standard. If Q can reach the test standard within the time t, the test is terminated and the carbon canister 100 passes the flow test; if Q still cannot reach the test standard within the time t, the carbon canister 100 is judged to be unqualified.

[0038] The test standards of P, Q and t are all test standards developed according to different models of carbon canisters 100. For example, P reaches (3±0.5) bar, and Q reaches (20±1) cm within 3 seconds. 3 / s, the carbon canister 100 is qualified. According to the performance requirements of different types of carbon canisters 100, the test standard of P, the test standard of Q and t can be selectively set, and are not limited here.

[0039] In actual production, the flow rate of the carbon canister 100 is tested by using the flow regulation test system provided in this embodiment, which can shorten the stable cycle of the test system to less than 5s, thereby improving the test efficiency, meeting the growing production demand for the carbon canister 100, ensuring the smooth completion of production goals, and reducing the production capacity loss of the remaining production steps due to the time-consuming testing process, thereby achieving the positive effect of reducing costs and increasing efficiency, and providing strong support for the efficient production of the carbon canister 100 in the automotive industry and the sustainable development of the entire industry.

[0040] like Figure 2 As shown, in the present embodiment, the flow regulating assembly 11 includes a flow regulating valve 111, a first pressure regulating sealing block 112 and a second pressure regulating sealing block 113. The inlet end of the flow regulating valve 111 is connected to the first pressure regulating sealing block 112, and the outlet end of the flow regulating valve 111 is connected to the second pressure regulating sealing block 113. By setting the first pressure regulating sealing block 112 and the second pressure regulating sealing block 113, on the one hand, the stability of the fluid pressure at both ends of the flow regulating valve 111 can be ensured, so that the flow regulating valve 111 can work under a stable pressure difference, thereby more accurately controlling the flow of the fluid; on the other hand, it can play a role of pressure limiting protection for the system, thereby preventing the flow regulating valve 111 from being damaged by excessive pressure; in addition, connecting the flow regulating valve 111, the vacuum pump and the carbon canister 100 through the first pressure regulating sealing block 112 and the second pressure regulating sealing block 113 helps to improve the sealing of the flow regulation test system, thereby improving the accuracy of the test results.

[0041] Furthermore, the flow adjustment component 11 includes multiple flow adjustment valves 111. The multiple flow adjustment valves 111 are adjusted together, which can further improve the adjustment efficiency, thereby shortening the test cycle and improving the test efficiency. In addition, by setting up multiple flow adjustment valves 111, a single failure can be effectively avoided to cause system paralysis, thereby improving the reliability and stability of the system.

[0042] like Figure 3 and Figure 4 As shown, in this embodiment, the flow detection assembly 24 includes a laminar flow tube 241 and a pressure difference sensor 242. One end of the laminar flow tube 241 is connected to the second valve body 22, and the other end can be connected to the carbon canister 100. The pressure difference sensor 242 is used to detect the pressure difference ΔP at both ends of the laminar flow tube 241. According to Poiseuille's law, Among them, Q is the flow rate passing through any cross section of the laminar flow tube 241 per unit time, that is, the flow rate passing through the carbon canister 100 per unit time, R is the radius of the pipe in the laminar flow tube 241, μ is the dynamic viscosity of the fluid, and L is the length of the pipe in the laminar flow tube 241. Since the mathematical relationship between Q and ΔP is clear, the flow rate can be calculated with high accuracy by using the pressure difference ΔP fed back by the pressure difference sensor 242; and since the fluid flow state in the laminar flow tube 241 is laminar flow, the laminar flow has a stable velocity distribution, which can provide a stable flow measurement environment, reduce the unstable product quality caused by flow measurement fluctuations, and help improve the accuracy of the measurement results; in addition, the laminar flow tube 241 also has the advantages of simple structure, low cost, and easy maintenance.

[0043] Specifically, the test mechanism 2 also includes a mounting block 243, in which a flow channel is provided, and the absolute pressure sensor 23 is mounted on the mounting block 243, and the detection end of the absolute pressure sensor 23 is connected to the laminar flow tube 241 through the flow channel; the two detection ends of the differential pressure sensor 242 are respectively connected to the two ends of the laminar flow tube 241 through the flow channel. The design of the mounting block 243 can concentrate the connection between the absolute pressure sensor 23 and the differential pressure sensor 242 and the test channel in a specific area, which is conducive to improving space utilization, preventing the connection pipelines from being randomly distributed, and making the entire installation layout more compact; compared with complex external pipelines, the flow channel in the mounting block 243 is shorter and the shape of the flow channel is regular, so that the pressure signal can be transmitted from the pipeline to the absolute pressure sensor 23 and the differential pressure sensor 242 more quickly, which is conducive to improving the system response speed, thereby improving the test and adjustment efficiency.

[0044] In other embodiments, the flow detection component 24 includes but is not limited to an ultrasonic flow meter, a turbine flow meter or an electromagnetic flow meter, etc., which is not limited here.

[0045] Furthermore, an air inlet end is provided on the side of the second valve body 22 away from the flow detection component 24, and a temperature sensor 28 is provided on the air inlet end. In the test standard of the carbon canister 100, higher requirements are placed on the temperature of the test environment. When the temperature sensor 28 detects that the temperature of the gas input at the air inlet end deviates from the standard temperature, the flow regulation test system will stop the test to ensure the accuracy and authenticity of the test results.

[0046] In some optional embodiments, the test mechanism 2 further includes a third valve body 25, which is disposed at one end of the flow detection assembly 24 close to the carbon canister 100. Before testing the carbon canister 100, firstly, a negative pressure is established for the test mechanism 2, and the second valve body 22 and the third valve body 25 are closed, and the absolute pressure between the second valve body 22 and the third valve body 25 is detected to detect the air tightness of the test mechanism 2, so as to prevent the leakage of the test mechanism 2 from affecting the test of the carbon canister 100, thereby further ensuring the accuracy of the test result.

[0047] It is easy to understand that in production, the reliability of the flow control test system can be ensured by regularly testing the air tightness of the test mechanism 2. Of course, the air tightness of the test mechanism 2 can also be tested before each carbon canister 100 is tested, which is not limited here.

[0048] Among them, the first valve body 21, the second valve body 22 and the third valve body 25 are all shut-off valves, which are easy to operate, have good sealing performance and high reliability.

[0049] like Figure 2 As shown, the regulating mechanism 1 also includes a first base plate 12, the vacuum pump and the flow regulating assembly 11 are both installed on the first base plate 12, and a first handle 13 is provided on the first base plate 12. The regulating mechanism 1 is integrated in the first base plate 12, has a compact structure, and can be conveniently carried using the first handle 13.

[0050] like Figure 3 and Figure 4 As shown, similarly, the test mechanism 2 also includes a second base plate 26, and the first valve body 21, the second valve body 22, the absolute pressure sensor 23 and the flow detection assembly 24 are all installed on the second base plate 26, and a second handle 27 is provided on the second base plate 26. The test mechanism 2 is integrated in the second base plate 26, has a compact structure, and can be conveniently carried using the second handle 27.

[0051] In this embodiment, the flow regulation test system also includes a control unit. The first valve body 21, the second valve body 22, the third valve body 25, the absolute pressure sensor 23, the differential pressure sensor 242 and the flow adjustment valve 111 are all connected to the control unit signal. The control unit can control the opening or closing of the first valve body 21, the second valve body 22 and the third valve body 25. When the differential pressure sensor 242 detects the pressure difference at both ends of the laminar flow tube 241, the flow signal is calculated by a formula. When the control unit receives the flow signal, it compares it with the test standard and controls the valve opening of the flow adjustment valve 111 so that Q is close to the test standard to achieve automated rapid testing.

[0052] This embodiment also provides a flow regulation test method, which uses the flow regulation test system of any of the above embodiments, including the following steps:

[0053] S1: Install the carbon canister 100 between the first valve body 21 and the flow detection assembly 24;

[0054] S2: Start the vacuum pump to create a negative pressure environment;

[0055] S3: close the first valve body 21 and the second valve body 22, and detect the absolute pressure P between the first valve body 21 and the second valve body 22 through the absolute pressure sensor 23. If P reaches the test standard, proceed to the next step. If P does not reach the test standard, the carbon canister 100 is determined to be a defective product.

[0056] S4: When P reaches the test standard, the first valve body 21 and the second valve body 22 are opened, and the flow regulating valve 111 is adjusted according to the feedback data of the flow detection component 24, wherein the flow detection component 24 can detect the flow Q passing through the carbon canister 100 per unit time; if Q can reach the test standard within the time t, the test is terminated and the carbon canister 100 passes the flow test; if Q still cannot reach the test standard within the time t, the carbon canister 100 is judged to be a defective product.

[0057] By adopting the above-mentioned flow regulation test system to test the flow of the carbon canister 100, the stable cycle of the test system can be shortened to less than 5s, thereby improving the test efficiency, meeting the growing production demand for the carbon canister 100, ensuring the smooth completion of production targets, and reducing the capacity loss of the remaining production steps caused by the time-consuming testing process, thereby achieving the positive effect of reducing costs and increasing efficiency, and providing strong support for the efficient production of the carbon canister 100 in the automotive industry and the sustainable development of the entire industry.

[0058] Furthermore, the testing mechanism 2 also includes a third valve body 25, which is arranged at one end of the flow detection assembly 24 close to the carbon canister 100. Before step S3, the second valve body 22 and the third valve body 25 are closed, and the absolute pressure P0 between the second valve body 22 and the third valve body 25 is detected by the absolute pressure sensor 23. If P0 does not meet the test standard, the testing mechanism 2 is repaired and the absolute pressure P0 between the second valve body 22 and the third valve body 25 is detected again until P0 meets the test standard, thereby preventing the testing mechanism 2 from affecting the test of the carbon canister 100 due to poor airtightness, thereby ensuring the accuracy of the test results.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A flow regulation test system for testing the flow of a carbon canister (100), characterized in that: The flow regulation test system comprises a regulating mechanism (1) and a testing mechanism (2), wherein the regulating mechanism (1) comprises a vacuum pump and a flow regulation assembly (11), wherein the flow regulation assembly (11) is arranged at the inlet end of the vacuum pump; the testing mechanism (2) comprises a first valve body (21), a second valve body (22), an absolute pressure sensor (23) and a flow detection assembly (24), wherein the first valve body (21) is arranged at an end of the flow regulation assembly (11) away from the vacuum pump, and the second valve body (22) is arranged at one end of the flow detection assembly (24), and the carbon canister (100) can be installed between the other end of the flow detection assembly (24) and the first valve body (21), wherein the absolute pressure sensor (23) is used to detect the absolute pressure between the first valve body (21) and the second valve body (22), and the flow detection assembly (24) can detect the flow rate passing through the carbon canister (100) per unit time.

2. The flow regulation test system according to claim 1, characterized in that: The flow regulating assembly (11) comprises a flow regulating valve (111), a first pressure regulating sealing block (112) and a second pressure regulating sealing block (113); the inlet end of the flow regulating valve (111) is connected to the first pressure regulating sealing block (112), and the outlet end of the flow regulating valve (111) is connected to the second pressure regulating sealing block (113).

3. The flow regulation test system according to claim 2, characterized in that: The flow regulating component (11) comprises a plurality of flow regulating valves (111).

4. The flow regulation test system according to claim 1, characterized in that: The flow detection assembly (24) comprises a laminar flow tube (241) and a pressure difference sensor (242); one end of the laminar flow tube (241) is connected to the second valve body (22), and the other end can be connected to the carbon canister (100); the pressure difference sensor (242) is used to detect the pressure difference between the two ends of the laminar flow tube (241).

5. The flow regulation test system according to claim 1, characterized in that: An air inlet end is provided on a side of the second valve body (22) away from the flow detection component (24), and a temperature sensor (28) is provided on the air inlet end.

6. The flow regulation test system according to claim 1, characterized in that: The testing mechanism (2) further comprises a third valve body (25), wherein the third valve body (25) is arranged at one end of the flow detection assembly (24) close to the carbon canister (100).

7. The flow regulation test system according to claim 6, characterized in that: The first valve body (21), the second valve body (22) and the third valve body (25) are all shut-off valves.

8. The flow regulation test system according to any one of claims 1 to 7, characterized in that: The regulating mechanism (1) further comprises a first bottom plate (12), the vacuum pump and the flow regulating assembly (11) are both mounted on the first bottom plate (12), and a first handle (13) is provided on the first bottom plate (12); and / or, The testing mechanism (2) further comprises a second base plate (26), the first valve body (21), the second valve body (22), the absolute pressure sensor (23) and the flow detection assembly (24) are all mounted on the second base plate (26), and a second handle (27) is provided on the second base plate (26).

9. A flow regulation test method, characterized in that: The flow regulation test system according to any one of claims 1 to 8 comprises the following steps: S1: installing the carbon canister (100) between the first valve body (21) and the flow detection assembly (24); S2: Start the vacuum pump to create a negative pressure environment; S3: closing the first valve body (21) and the second valve body (22), detecting the absolute pressure P between the first valve body (21) and the second valve body (22) by means of the absolute pressure sensor (23); if P reaches the test standard, continuing to the next step of testing; if P fails to reach the test standard, determining that the carbon canister (100) is a defective product; S4: When P reaches the test standard, the first valve body (21) and the second valve body (22) are opened, and the flow adjustment component (11) is adjusted according to the feedback data of the flow detection component (24), wherein the flow detection component (24) is capable of detecting the flow Q passing through the carbon canister (100) per unit time; if Q can reach the test standard within the time t, the test is terminated and the carbon canister (100) passes the flow test; if Q still cannot reach the test standard within the time t, the carbon canister (100) is determined to be a defective product.

10. The flow regulation test method according to claim 9, characterized in that: The test mechanism (2) further comprises a third valve body (25), wherein the third valve body (25) is arranged at one end of the flow detection assembly (24) close to the carbon canister (100). Before the step S3, the second valve body (22) and the third valve body (25) are closed, and the absolute pressure P0 between the second valve body (22) and the third valve body (25) is detected by the absolute pressure sensor (23). If P0 does not meet the test standard, the test mechanism (2) is repaired, and the absolute pressure P0 between the second valve body (22) and the third valve body (25) is detected again until P0 meets the test standard.

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